Lubrication 2300-2600 engineAn eccentric rotor type oiIpump. driven direct from the crankshaft. draws oil from thesump through a strainer and delivers it to an external by-pass canister type filter.Between the pump and filter, but incorporated in the pump body, is a pressure reliefvalve. Excess oil from the valve drains back into the sump. Filtered oil passes into themain oil gallery on the right-hand side of the engine. Passages in the crankcase direct oilfrom the gallery to the four main bearings and through drilling’s in the crankshaft to theconnecting-rod journals. Oil finally escapes through a small drilling In the connecting-rods directing a spray to the inside of the pistons, mainly for cooling purposes. The main gallery also supplies oil through a passage in the cylinder block and cylinderhead to the camshaft, rocker shaft and the valve gear. A restrictor, however,with a non-return valve is fitted into the vertical oil passage in the top face ofthe cylinder block to reduce pressure to the camshaft carrier. The valveprevents oil draining back down the gallery thereby maintaining a column of oilwhen the engine is idle. Oil drains from the camshaft carrier back into the sumpthrough a passage at the front and rear of the engine.

This is the area the oil from the cylinder head enters the engine. The restrictor prevents oil draining back into the gallery and maintains a column of oil when the engine is idle.

Lubrication 2300-2600 engineAn eccentric rotor type oiIpump. driven direct from the crankshaft. draws oil fromthe sump through a strainer and delivers it to an external by-pass canister typefilter. Between the pump and filter, but incorporated in the pump body, is apressure relief valve. Excess oil from the valve drains back into the sump. Filteredoil passes into the main oil gallery on the right-hand side of the engine. Passages inthe crankcase direct oil from the gallery to the four main bearings and throughdrilling’s in the crankshaft to the connecting-rod journals. Oil finally escapesthrough a small drilling In the connecting-rods directing a spray to the inside of thepistons, mainly for cooling purposes. The main gallery also supplies oil through a passage in the cylinder block andcylinder head to the camshaft, rocker shaft and the valve gear. A restrictor,however, with a non-return valve is fitted into the vertical oil passage in thetop face of the cylinder block to reduce pressure to the camshaft carrier.The valve prevents oil draining back down the gallery thereby maintaining acolumn of oil when the engine is idle. Oil drains from the camshaft carrierback into the sump through a passage at the front and rear of the engine.

This is the area the oil from the cylinder head enters the engine. The restrictor prevents oil draining back into the gallery and maintains a column of oil when the engine is idle.